Municipal compost-based mixture for acid mine drainage bioremediation: Metal retention mechanisms

被引：80

作者：

Gibert, O

de Pablo, J ^{[1
]}

Cortina, JL

Ayora, C

机构：

[1] Univ Politecn Catalunya, ETSEIB, Dept Engn Quim, E-08028 Barcelona, Spain

[2] Univ Politecn Catalunya, Ctr Tecnol Manresa, Area Tecnol Ambiental, Dept Engn Quim, Manresa 08240, Spain

[3] CSIC, Inst Ciencies Terra Jaume Almera, E-08028 Barcelona, Spain

来源：

APPLIED GEOCHEMISTRY | 2005年 / 20卷 / 09期

关键词：

D O I：

10.1016/j.apgeochem.2005.04.012

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

An upflow packed column was operated to evaluate the potential of a mixture of municipal compost and calcite to promote sulphidogenesis in the remediation of a simulated mine water at high flows (> 0.1 m d(-1)). Results showed that the pH was neutralised and metals (Fe, Al, Zn, Cu) were significantly removed. Metal removal was attributed to the combined result of precipitation as metal (oxy)hydroxides and carbonates, co-precipitation with these (oxy)hydroxides and sorption onto the compost surface rather than to precipitation as metal sulphides. The two last mechanisms are especially significant for Zn, whose hydroxide is not expected to precipitate at pH 6-7. Before the saturation of compost sorption sites, 60% of the influent Zn was estimated to have been removed by co-precipitation with Fe- and Al(oxy)hydroxide and 40% by sorption onto the municipal compost. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1648 / 1657

页数：10

共 45 条

[1] The removal of heavy-metal ions by seaweeds and their derivatives [J].